A maintenance worker accidentally fired a 20mm Vulcan cannon from an F-16 jet he was working on at Belgium’s Florennes Air Force Base earlier this week, destroying another F-16 while damaging another aircraft nearby, according to multiple media reports.

A worker apparently opened fire across the flight line while performing maintenance on Oct. 11, according to Avio News. The F-16 that was racked by cannon fire quickly caught fire and exploded, since it was loaded with fuel and being readied for an afternoon sortie, according to Avion News.

The affected F-16 caught fire and was completely destroyed, also because it was loaded with fuel, and two other models of the US fighter were slightly damaged by the blast.